Von Duprin 33 - Frame Preparation; 338 Top Strike Frame Preparation; Ratchet Release Frame Preparation

7
C
L
338 Top strike
Ratchet release
7/16”
1-1/8”
9/16”
#25 Drill
#10-24 tap,
2 places
Latch case
Plunger must go thru
hole in door.
Adjust so plunger
releases latch bolt
when door is closed.
Reinforcing
required
Plunger
15/16”
Beveled
edge
6” min.
1” min.
1/8”
Edge of stop
1-5/16”
21/32”
13/32”
15/16”
1-7/8”
Beveled edge
Should face this
direction in relation
to doors
13/16”
13/32”
1/4” dia.
82
°
csk. x 3/8”
dia. in frame
Double door application
Latch bolt LHR door
Latch bolt RHR door
C
L
C
L
C
L
FRAME PREPARATION
1-5/8”
Doors swing out
this direction